serial: sh-sci: Allow for compressed SCIF address

Some devices with SCIx_SH4_SCIF_REGTYPE have no space between registers.
Use the register area size to determine the spacing between register.

Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 6ff6f2b..c29244f 100644 (file)
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -348,15 +348,15 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
        [SCIx_SH4_SCIF_REGTYPE] = {
                .regs = {
                        [SCSMR]         = { 0x00, 16 },
-                       [SCBRR]         = { 0x04,  8 },
-                       [SCSCR]         = { 0x08, 16 },
-                       [SCxTDR]        = { 0x0c,  8 },
-                       [SCxSR]         = { 0x10, 16 },
-                       [SCxRDR]        = { 0x14,  8 },
-                       [SCFCR]         = { 0x18, 16 },
-                       [SCFDR]         = { 0x1c, 16 },
-                       [SCSPTR]        = { 0x20, 16 },
-                       [SCLSR]         = { 0x24, 16 },
+                       [SCBRR]         = { 0x02,  8 },
+                       [SCSCR]         = { 0x04, 16 },
+                       [SCxTDR]        = { 0x06,  8 },
+                       [SCxSR]         = { 0x08, 16 },
+                       [SCxRDR]        = { 0x0a,  8 },
+                       [SCFCR]         = { 0x0c, 16 },
+                       [SCFDR]         = { 0x0e, 16 },
+                       [SCSPTR]        = { 0x10, 16 },
+                       [SCLSR]         = { 0x12, 16 },
                },
                .fifosize = 16,
                .overrun_reg = SCLSR,
@@ -2848,7 +2848,7 @@ static int sci_init_single(struct platform_device *dev,
 {
        struct uart_port *port = &sci_port->port;
        const struct resource *res;
-       unsigned int i;
+       unsigned int i, regtype;
        int ret;
 
        sci_port->cfg   = p;
@@ -2885,6 +2885,7 @@ static int sci_init_single(struct platform_device *dev,
        if (unlikely(sci_port->params == NULL))
                return -EINVAL;
 
+       regtype = sci_port->params - sci_port_params;
        switch (p->type) {
        case PORT_SCIFB:
                sci_port->rx_trigger = 48;
@@ -2939,6 +2940,10 @@ static int sci_init_single(struct platform_device *dev,
                        port->regshift = 1;
        }
 
+       if (regtype == SCIx_SH4_SCIF_REGTYPE)
+               if (sci_port->reg_size >= 0x20)
+                       port->regshift = 1;
+
        /*
         * The UART port needs an IRQ value, so we peg this to the RX IRQ
         * for the multi-IRQ ports, which is where we are primarily